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Class Information
Number: 340/511
Name: Communications: electrical > Condition responsive indicating system > With particular system function (e.g., temperature compensation, calibration) > Alarm system supervision > Threshold or window (e.g., of analog electrical level)
Description: Subject matter wherein the supervisory circuit is coupled to the primary alarm circuit and is responsive to the signal therein attaining a predetermined level or range of levels.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6424930 |
Distributed processing system for component lifetime prediction |
Jul. 23, 2002 |
| 6414594 |
Method and apparatus for user-initiated alarms in process control system |
Jul. 2, 2002 |
| 6392536 |
Multi-sensor detector |
May. 21, 2002 |
| 6384723 |
Digital communication system and method |
May. 7, 2002 |
| 6348868 |
Fault alarm for abnormal temperature detection |
Feb. 19, 2002 |
| 6346880 |
Circuit and method for controlling an alarm |
Feb. 12, 2002 |
| 6344802 |
Control system |
Feb. 5, 2002 |
| 6339372 |
Protective system for work in radioactive environments |
Jan. 15, 2002 |
| 6317034 |
Alarm sensor multiplexing |
Nov. 13, 2001 |
| 6314054 |
Apparatus for detecting objects |
Nov. 6, 2001 |
| 6307469 |
Remote detection device |
Oct. 23, 2001 |
| 6300871 |
Multi-station RF thermometer and alarm system |
Oct. 9, 2001 |
| 6288640 |
Open transmission line intrusion detection system using frequency spectrum analysis |
Sep. 11, 2001 |
| 6288638 |
Heat detector having an increased accuracy alarm temperature threshold and improved low temperature testing capabilities |
Sep. 11, 2001 |
| 6281598 |
Method and system for predicting incipient failure in a locomotive energy storage unit or energy storage unit cabling |
Aug. 28, 2001 |
| 6255944 |
Remote indication device for use in wireless security systems |
Jul. 3, 2001 |
| 6252503 |
Method of monitoring a sensor device and sensor device and analysis unit with monitoring means |
Jun. 26, 2001 |
| 6249220 |
Detected information display system in fire detecting system |
Jun. 19, 2001 |
| 6239699 |
Intelligent alarm filtering in a telecommunications network |
May. 29, 2001 |
| 6229439 |
System and method of filtering |
May. 8, 2001 |
| 6222448 |
Switchgear cabinet with a central control device for monitoring and controlling built-in and/or attached units |
Apr. 24, 2001 |
| 6208247 |
Wireless integrated sensor network using multiple relayed communications |
Mar. 27, 2001 |
| 6195011 |
Early fire detection using temperature and smoke sensing |
Feb. 27, 2001 |
| 6191689 |
Detection device |
Feb. 20, 2001 |
| 6188321 |
Monitoring circuit for a supply voltage |
Feb. 13, 2001 |
| 6163263 |
Circuitry for electrical device in multi-device communications system |
Dec. 19, 2000 |
| 6154129 |
Operation system for transmission devices and alarm monitoring method |
Nov. 28, 2000 |
| 6133828 |
Fire detection and alarm system with selective fire warning |
Oct. 17, 2000 |
| 6130707 |
Video motion detector with global insensitivity |
Oct. 10, 2000 |
| 6127932 |
Optical flame sensor having opaque hollow tube |
Oct. 3, 2000 |
| 6124790 |
System and method for filtering an alarm |
Sep. 26, 2000 |
| 6114955 |
System and method for antenna failure detection |
Sep. 5, 2000 |
| 6111512 |
Fire detection method and fire detection apparatus |
Aug. 29, 2000 |
| 6107919 |
Dual sensitivity mode system for monitoring processes and sensors |
Aug. 22, 2000 |
| 6107918 |
Method for personal computer-based home surveillance |
Aug. 22, 2000 |
| 6104286 |
Monitoring alarm systems |
Aug. 15, 2000 |
| 6084522 |
Temperature sensing wireless smoke detector |
Jul. 4, 2000 |
| 6078253 |
Occupancy sensor and method of operating same |
Jun. 20, 2000 |
| 6046674 |
Multi-station RF thermometer and alarm system |
Apr. 4, 2000 |
| 6034608 |
Tornado alarm system |
Mar. 7, 2000 |
| 6031455 |
Method and apparatus for monitoring environmental conditions in a communication system |
Feb. 29, 2000 |
| 6023222 |
Method of monitoring a plurality of control loops by regulation ratio monitoring |
Feb. 8, 2000 |
| 6023223 |
Early warning detection and notification network for environmental conditions |
Feb. 8, 2000 |
| 6014076 |
Apparatus and method for achieving intrinsic safety using conventional sensors |
Jan. 11, 2000 |
| 6011464 |
Method for analyzing the signals of a danger alarm system and danger alarm system for implementing said method |
Jan. 4, 2000 |
| 6002338 |
Method and system for detecting failures in self-exciting sensor |
Dec. 14, 1999 |
| 5998985 |
Voltage indicator using serial comparison voltage measurement |
Dec. 7, 1999 |
| 5973594 |
Multiple optical designs for a multifunction sensor |
Oct. 26, 1999 |
| 5969604 |
System and method of adjusting smoothing |
Oct. 19, 1999 |
| 5936520 |
Analog sensor status detection single wire bus multiplex system |
Aug. 10, 1999 |
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